That wasn't on Barrett. The pitcher took off while Marquis still had the ball and he made a high throw to second base. Marquis never threw a pitch on that one.
what was the question? Which two players hit HR's on back to back pitches on July something, 2004 to give the Cubs an 11-10 win over the Reds? It was on this day.. Hmmm...don't know why I thought it was in July.